A man, infuriated over marital dispute, stabbed his mother and father-in-law to death and critically injured three other persons including his wife here, police said.
The incident took place around 7.30 p.m. on Friday, when Chintu came to meet his wife, Renu, at his in-laws' house to give them sweets for Diwali.
"The couple had a dispute last year and Renu had been staying at her parents' house in Chirag Delhi since then," said Nupur Prasad, Additional Deputy Commissioner of Police.
Chintu, who works as a driver, indulged in fight with the family attacked them with nail which used to fix tents, Prasad said.
Renu's mother Roshan, 54, and her father Trilok Chand, 54, died during the attack, while the injured, Neha, Renu and her brother Lalit, have been admitted to All India Institute of Medical Science (AIIMS) trauma centre in critical condition.
After hearing commotion, some neighbours tried to rescue the family and also beat up Chintu, who is admitted in ICU at AIIMS.
A case has been registered against Chintu.